Forstner bit
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United States of America Patent
Stats
-
Dec 9, 1997
Grant Date -
N/A
app pub date -
Jul 21, 1995
filing date -
Nov 5, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A Forstner bit including a cutter having radial major cutting edges, circumferential cutting edges and a shank adapted to be clamped in a chuck. The cutter is threadably attached to the shank by a rear stem of the cutter being accommodated in a threaded hole provided in the shank. The cutter is formed as a monolithic casting fashioned of a precision-casting steel alloy, with the cutter being subjected to additional grinding only along the major cutting edges and the circumferential cutting edges.
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